191796971 has 4 divisors (see below), whose sum is σ = 191830944. Its totient is φ = 191763000.

The previous prime is 191796961. The next prime is 191797003. The reversal of 191796971 is 179697191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191796971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191796961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6260 + ... + 20561.

It is an arithmetic number, because the mean of its divisors is an integer number (47957736).

Almost surely, 2^191796971 is an apocalyptic number.

191796971 is a deficient number, since it is larger than the sum of its proper divisors (33973).

191796971 is an equidigital number, since it uses as much as digits as its factorization.

191796971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33972.

The product of its digits is 214326, while the sum is 50.

The square root of 191796971 is about 13849.0783447853. The cubic root of 191796971 is about 576.6964102330.

The spelling of 191796971 in words is "one hundred ninety-one million, seven hundred ninety-six thousand, nine hundred seventy-one".